---
type: "Bill"
title: "Tetrahydrocannabinol concentration; definition."
description: "Tetrahydrocannabinol concentration; definition.Clarifies that \"tetrahydrocannabinol concentration\" refers to delta-9-tetrahydrocannabinoland is determined using post-decarboxylation testing or other equivalentmethod. The bill contains an emergency clause."
jurisdiction: "us/states/va"
legislature: "Virginia General Assembly"
session: "2020"
identifier: "SB 646"
citation: "Virginia SB 646 (2020)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Scott A. Surovell"]
version_count: 4
action_count: 31
vote_count: 7
first_action: "2020-01-07"
last_action: "2020-04-07"
source: "openstates"
source_identifier: "ocd-bill/3f28c1f9-71ac-417f-86ef-1b5ed11ef243"
source_url: "https://lis.virginia.gov/cgi-bin/legp604.exe?201+sum+SB646"
source_hash: "e387fced8067bc8c332ed4fd4945e9e8ec42ca461063c95b855779c4ede13a56"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-va"]
---

# Virginia SB 646 (2020) — Tetrahydrocannabinol concentration; definition.

Tetrahydrocannabinol concentration; definition.Clarifies that "tetrahydrocannabinol concentration" refers to delta-9-tetrahydrocannabinoland is determined using post-decarboxylation testing or other equivalentmethod. The bill contains an emergency clause.

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Acts of Assembly Chapter text (CHAP0831)** (committee substitute) — [source](https://lis.virginia.gov/cgi-bin/legp604.exe?201+ful+CHAP0831)
2. **Bill text as passed Senate and House (SB646ER)** (committee substitute) — [source](https://lis.virginia.gov/cgi-bin/legp604.exe?201+ful+SB646ER)
3. **Impact statement from DPB (SB646)** (committee substitute) — [source](https://lis.virginia.gov/cgi-bin/legp604.exe?201+ful+SB646)
4. **Impact statement from DPB (SB646S1)** (committee substitute) — [source](https://lis.virginia.gov/cgi-bin/legp604.exe?201+ful+SB646S1)

## Votes

- Passed Senate (39-Y 0-N) — **39–0** (pass) · upper
- Constitutional reading dispensed (39-Y 0-N) — **39–0** (pass) · upper
- Reported from Courts of Justice (21-Y 0-N) — **21–0** (pass) · lower
- VOTE: Block Vote Passage (98-Y 0-N) — **97–0** (pass) · lower
- Subcommittee recommends reporting (8-Y 0-N) — **8–0** (pass) · lower
- Reported from Agriculture, Conservation and Natural Resources with substitite (14-Y 0-N) — **14–0** (pass) · upper
- Constitutional reading dispensed (40-Y 0-N) — **40–0** (pass) · upper

## Sponsors

- Scott A. Surovell — primary (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2020-01-07** Prefiled and ordered printed with emergency clause; offered 01/08/20 20105071D `introduction`
- **2020-01-07** Referred to Committee on Agriculture, Conservation and Natural Resources `referral-committee`
- **2020-01-14** Assigned ACNR sub: Hemp `referral-committee`
- **2020-01-22** Impact statement from DPB (SB646)
- **2020-02-04** Committee substitute printed 20107636D-S1 `substitution`
- **2020-02-04** Reported from Agriculture, Conservation and Natural Resources with substitite (14-Y 0-N) `committee-passage`
- **2020-02-06** Constitutional reading dispensed (40-Y 0-N)
- **2020-02-07** Impact statement from DPB (SB646S1)
- **2020-02-07** Read second time `reading-2`
- **2020-02-07** Reading of substitute waived
- **2020-02-07** Committee substitute agreed to 20107636D-S1
- **2020-02-07** Engrossed by Senate - committee substitute SB646S1
- **2020-02-07** Constitutional reading dispensed (39-Y 0-N)
- **2020-02-07** Passed Senate (39-Y 0-N) `passage`
- **2020-02-12** Placed on Calendar
- **2020-02-12** Read first time `reading-1`
- **2020-02-12** Referred to Committee for Courts of Justice `referral-committee`
- **2020-02-14** Assigned Courts sub: Criminal `referral-committee`
- **2020-02-24** Subcommittee recommends reporting (8-Y 0-N)
- **2020-02-28** Reported from Courts of Justice (21-Y 0-N) `committee-passage`
- **2020-03-03** Read second time `reading-2`
- **2020-03-04** Read third time `reading-3`
- **2020-03-04** Passed House BLOCK VOTE (98-Y 0-N) `passage`
- **2020-03-04** VOTE: Block Vote Passage (98-Y 0-N)
- **2020-03-07** Enrolled
- **2020-03-07** Signed by President
- **2020-03-08** Signed by Speaker
- **2020-03-09** Impact statement from DPB (SB646ER)
- **2020-03-12** Enrolled Bill Communicated to Governor on March 12, 2020
- **2020-03-12** Governor's Action Deadline 11:59 p.m., April 11, 2020
- **2020-04-07** Approved by Governor-Chapter 831 (effective 4/7/20) `executive-signature`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/3f28c1f9-71ac-417f-86ef-1b5ed11ef243`. Confidence: reported (aggregated from official Virginia legislature records).